Good afternoon
My early series 2 is now upgraded from a 125 to a 175 with a 22mm scootopia carb.
All runs nice with the original air scoop taken off so i have got a much larger GP scoop which will fit.
My air box has an 18mm inlet, i hear that you can drill holes in the box to improve air intake as well.
If that is the case does anyone know how many holes to drill, what diameter and presumably drill them near the top of the air box.
cheers